diff --git a/platform/platform-api/src/org/jetbrains/ide/CustomPortServerManager.java b/platform/platform-api/src/org/jetbrains/ide/CustomPortServerManager.java
index 3a0833dcbe91..25633b5077cd 100644
--- a/platform/platform-api/src/org/jetbrains/ide/CustomPortServerManager.java
+++ b/platform/platform-api/src/org/jetbrains/ide/CustomPortServerManager.java
@@ -11,6 +11,8 @@ public abstract class CustomPortServerManager {
 
   public interface CustomPortService {
     boolean rebind();
+
+    boolean isBound();
   }
 
   public abstract int getPort();
diff --git a/platform/platform-impl/src/org/jetbrains/io/SubServer.java b/platform/platform-impl/src/org/jetbrains/io/SubServer.java
index fb8d065161b3..5440afe76b96 100644
--- a/platform/platform-impl/src/org/jetbrains/io/SubServer.java
+++ b/platform/platform-impl/src/org/jetbrains/io/SubServer.java
@@ -37,6 +37,11 @@ public class SubServer implements CustomPortServerManager.CustomPortService, Dis
     }
   }
 
+  @Override
+  public boolean isBound() {
+    return !openChannels.isEmpty();
+  }
+
   private void stop() {
     // todo should we call releaseExternalResources? We use only 1 boss&worker thread
     openChannels.close().awaitUninterruptibly();